Therapeutic heating appliance



4 l, Il f llliihllllliiilli F.FORMANECK THERAPEUTIC HEATING APPLIANCEFiled Jan. 13, 1930 Dec. 8, 1931.

Patented Dec. 8, 1931 UNITED sTATEsf THERAPEUTIC HEATING APPIJANCEApplication led January 13, 1980. Serial No. 420,386.

uniform heating effect and also adapted for` ready and effectivevattachment in place on the person of a party using the same, all aswill hereinafter more fully appear.

In the accompanying drawings: Fig. 1 is a sectional elevation on line1-1,

Fig. 2, of an electric heating appliance embodying this invention.

Fig. 2 is a section on line 2 2, Fig. 1 of the same.

Like reference numerals indicate like parts in both views.

In the preferred form of this invention, the enclosing shell or housinghas the form of a shallow shell comprising a circular wall l and dishedtop and bottom Walls 2 and 3,

with the dished bottom wall 3 in connection with a lower marginal rim 4of the wall 1 providing an open bottom receiving chamber 5 the roof ofwhich is of a sphero-concave form for a medicated pad or other form ofmedicv amental substance intended for use in local treatment of variousparts of thc human body. In the present construction the upper marginalrim or seam 6 of the wall 1 is formed with a plurality of slits ororifices 7 to receive a tape or bandage by means of which the applianceis secured in place on the part of the person using the same.

Arranged centrally in the interior of the enclosing shell or casing ofthe appliance, is an electrical heating unit of the resistance type.preferably of a construction as follows:

A pair of outer circular sheets 8 and 9 of non-'electric material,usually mica, in separated relation, provides a protecting enclosure foran inner core 10 of non-electric material, usually mica, whichcore isformed into a pair of opposed semi-circular sections, with the opposedcurved and straight margins thereof formed with a plurality of notches11 in spaced relation, and into which the windings of the resistancewire 12 is engaged and held in proper relation one to the other asillustrated in Fig. 2.

The above mentioned electrical resistance wire 12, by which the heatingof the appliance 53 is effected, will usually be formed of the wellknown nichrolne alloy, and in a ten watt element will contain nine feet#43 B. S. gauge, of such wire, and in a fifteen watt element willcontain a like nine feet #45 B. S. gauge, 60 of said wire. Theresistance wire windings 12 on the respective semi-circular sections ofthe core 11 are in seriesLwith the respective terminal ends of suchwindings electrically connected to the line wires of an ordinaryflexible conducting cord 13, which is employed to conduct theelectromotive force from a Wall socket or the like to the presentappliance.

As usual in portable electrical appliances of this and other types theflexible conducting cord 13 will be substantially anchored by a holdingbushing 14, in the wall 1 of the appliance, with a View to avoidaccidental and injurious strain on the heating unit in actual use of theappliance.

All vacant spaces vin the interior of the appliance are preferablyfilled with a mass 15 of loose asbestos.

Having thus fully described my invention what I claim, is

1. In an electrical heating appliance of the type herein described, thecombination of a closed containing housing formed with a dished bottomwall providing a containing cavity the roof of which is of asphere-concave form, a medicament carrying means in said cavity, anelectric heating unit arranged within the housing adajacent to saidbottom wall, and a flexible conducting cord attached to the wall of theappliance with its line wire connected to the terminals of the electricheating unit.

2. In an electrical heating ap liance of the type herein described, thecom ination of a closed containing housing formed with a dished bottomwall providing a containing cavity the roof of which is of asphero-concave form, a medicament carrying means in said cavity, anelectric heatlng unit arranged within the housing adjacent to saidbottom 10 Wall and 'comprising a pair of 4round nonelectric sheets inspaced relation, a nonelectric sheetfor core arranged between said outersheets, and a resistance wire wound upon said core or sheet, and aflexible conducting cord attached to the wall of the appliance v withits line wires connected to the terminals of the electrical heatingunit.

3. In an electrical heating appliance of the type herein described, thecombination of a closed containing housing formed with a dished bottomwall providing a containing cavity the roofof which is of asphero-concave form, a medicament carrying means in said cavity, anelectric heating unit arranged within the housing adjacent to saidbottom Wall and comprising a pair of round nonelectric sheets in spacedrelation, a nonelectric sheet or core arranged between said outer sheetsand formed into a pair of semicircular sectionsthe-opposed edges ofwhich are formed with a series of notches` a resistance wire wound uponsaid sections and hav-` ing holding` engagement in the notches, and aflexible conducting cord attached to the wall' of the appliance with itsline wires connected to the terminals ofthe electrical heating unit. 4.In an electric heating appliance of the type herein described, thecombination of a closed containing housing formed with dished top andbottom walls, the dished bottom wall providing a containing cavity theroof of which is of a sphere-concave form, a medicament carrying meansin said cavity, an electric heating unit arranged within the housingadjacent to said bottom wall,` and a flexible conducting cord attachedto a wall of the appliance with its line wires connected to theterminals of the electric heating unit,

the seam between the side and the top wall of thehousing having slitsfor engagement with an attaching tape or bandage.

5. In an electric heating appliance of the type herein described,thecombination of a closed containing housing formed with dished top andbottom Walls, the dished bottom wall providing a containing cavity theroof of which is of a sphero-concave form., a medicament carrying meansin said cavity, an`electric heating unit arranged within the housingadjacent to said bottom wall and comprising a pair of round non-electricsheets in spaced relation, anon-electric sheet or core arranged betweensaid outer sheets, a resistance wire wound upon said sheet or core, anda flexible conducting cord attached to a wall of the appliance with itsline wires connected to the terminals of the electrical heating unit,the seam between the side and the top wall of the housing having slitsfor engagement with an attaching tapeV or bandage.-V

lIn testimony whereof I hereunto ailix my signature.

FRED FORMANECK.

